Bin bottom for concrete structures



Jan. 11, 1938. CLEVER 2,104,896

BIN BOTTOM FOR CONCRETE STRUCTURES Filed Dec. 17, 1936 2 Sheets-Sheet l IlllllMllIl -E' Jan. 11, 1938. CLEVER 2,104,896

BIN BOTTOM FOR CONCRETE STRUCTURES Filed Dec. 17, 1936 2 Sheets-Sheet 2 Patented Jan. 11, 1938 UNITED STATES PATENT OFFICE BIN BOTTOM FOR CONCRETE STRUCTURES Illinois Application December :17, 1-936, Serial No. 116,304

10 Claims.

The present invention relates to-a means for securing and suspending the bin bottoms of .grain elevators or the like of the type which are constructed of poured concrete usually 'of cylindrical form, and the principal object of the present .invention is to provide a ledge or shoulder for the rim of thebin bottom so constructed as to lie "within the interior wall surface so as not to interfere with the employment-of sliding forms in the pouring of the concrete.

In the construction of grain elevators of the character in question, especially when constructed in cylindrical form, it is customary to pour the concrete by stages and to employ forms which after each pouring operation may be elevated to the next succeeding level, and in such circumstances it is evident that the employment of such forms will be seriously impeded or interfered with if the interior surface of the elevator wall presents protuberances which interrupt the continuity'of the wall surface. The present invention is therefore designed to make provision for the suspension of the bin bottom without interrupting the continuity of the wall surface in a way which will interfere with the employment of .sliding forms in the pouring operations, and at the same time to afford :a strong, rigid and easily applied metallic ledge or shelf for the support of the binbottom.

.A further object of the invention is to afford adequate support for the bin bottom within the confines of the wall itself, so that the use of girdersor columns beneath the bin bottom will be unnecessary, thereby eliminating structural features or elements tending to increase the expense and to obstruct available space within the elevator below the bin bottom, thus enabling such space tobe utilized for the handling of material and the installation of machinery.

Further objects .and details will appear from the description of the invention in conjunction with the accompanying drawings, wherein,

Figure 1 is a fragmentary view of a cylindrical elevator showing the lower portion in section to display the features of the present invention;

.Fig. 2 is adetail in plan of a portion of the metallic ledge or shelf for the rim of the bin bottom;

Fig. 3 is an enlarged sectional view through the sameshowing the means provided for securing therim or ledge .to the wall of the elevator;

Fig. 4 is a sectional view taken on line 4 of Fi 1;

Fig.5 is a sectional view takenpn line'5 of Fig. 1; and

Fig. .6 isa view showing the manner in which the sliding forms are employed in the pouring of concrete structures embodying the :features of the present invention.

The present invention is applied to a grain elevator or similar structure which in the present instance is illustrated asa cylindrical tower IQ of any height and dimensions commonly employed at "the present time either singly or in group arrangement for elevator purposes. It will be understood, however, that the cylindrical form is here shown merely for purposes of illustration, since the features of the present invention might be applied to structures of square, polygonal, or any other configuration.

In its completed form, the elevator or like structure will be provided onits inner wallsurface with an inwardly cut .angular groove .01 channel H extending continuously around the inner wall, which in the embodiment shown is of cylindrical formation. Within the groove is located a metallic ring l2 of ,angleformation comprising an upper flange .l3 and a lower .flange l4 standing in oblique :relation .to the horizontal and at right anglesto oneanother, although the angularity of the flanges .might be modified more or less without departing from the principles of the present invention.

The lower flange afiords a metallicledge or shelf for the support ofthe rimof .a bin bottom l5 which, as shown, is composedof segmental shaped sections l-B secured .at their abutting edges by overlapping straps I], or in any other suitable manner. This gives to the bin bottom as a whole .a conical or hoppershaped configuration leading to acentrally'disposed mouth or discharge .chute l-8 located at a convenient elevation above the .ground .level.

The ring-shaped ledge member..l.2, .as shown, may be formed of a continuous strip of angle iron bent to ring-shapedformation .in .the embodiment shown, and having .itsends secured .by an overlaping strap 1.9 which is .bolted or otherwisesecured in.any suitable manner. "I'heringshaped ledge member is supportedand .anchored to the concreteby the provision, at recurrent intervals, of bracket .clips 20 .each comprising a vertical leg 2|, .an inwardly extending top section .22, .and an oblique supporting section 23 which underlies the lower flange of the ringshapedledge member and is bolted thereto by .the provisionof bolts.24 entered through alined apertures 25.and.26, .the .bolts .being provided with nuts 2! for holding the ring-shaped ledge rigidly in position .upon .the bracket. clips. Each bracket clip is provided, through the top section..22, with an aperture 28 which receives a vertical dowel rod 29 which is imbedded within the concrete of the structure.

The bolts 24, as shown in Fig. 6, are provided with heads which are preferably retracted sufiiciently to act as anchors for imbedment within the concrete, and the nuts 21, during the concrete pouring, will serve simply to hold the bolts in this position, but after the structure has been completed, the nuts will be removed and the bolts utilized in securing the rim of the bin bottom in position, as indicated in Fig. 4, and

these bolts may, if desired, be supplemented by additional short bolts 30 extending through the ring-shaped ledge at points intermediate the bracket clips 20 and provided with nuts 3| bearing against the inner face of the bin bottom. In addition to the bolts 24 and 30, it is desirable to secure the rim of the bin bottom by a 'strip of place welding 32 around the margin of the bin bottom, and if additional reinforcement is required, spot welding or the like may be employed.

In the concrete pouring operation, a sliding form is employed having an outer form wall 33 and an inner form wall 34, which form is adapted to be lifted from level to level as the pouring operation progresses through succeeding stages.

In utilizing the features of the present invention in connection with the building of a grain elevator or the like, thelowercourse or courses of concrete will be poured to substantially the elevation illustrated in Fig. 6. After the lower course has hardened sufficiently to be self-sustaining, the bracket clips 20 will be positioned at recurrent intervals around the inner wall and the ring-shaped ledge l2 will be secured to the brackets at the desired level to afford a support for the rim of the bin bottom. The bracket clips will be held in place by the insertion of the lower ends of the dowel rods 29, which may either be driven into the soft concrete or, if desired, may have their lower ends imbedded during the pouring operation, so that they will stand in. position to anchor the clips. The angularly formed ring-shaped ledge will then be positioned. as in ends of the bolts will serve to anchor the rim I of the bin bottom, which, being formed in secthe structure.

Fig. 6, and held in place against the clips by means of the nuts 21. This brings the edge of the upper flange I3 into close proximity to the line of curvature of the wall, but enables the sliding form to be liftedjwithout interference to the desired height to pour the next course of concrete.

During the pouring operation, the ring-shaped ledge member will-act as a form to exclude the concrete from the space to be occupied by the rim of the bin bottom, so that after the second course is poured; as in Fig. 4, the ring-shaped ledge will be firmly imbedded within the wall of the structure and firmlyfanchored therein in .position to serve as a metallic ledge towhich the rim of the bin may be bolted. The protruding tions, may be easily positioned in place and secured by the nuts 21 and 3|, thus completing bin bottom affords a firmand rigid support for its suspension in a way which renders the use of columns or underpinning of any kind unnecessary, thereby permitting the space beneath the bin bottom to be utilized in any desirable manner.' I

The inventionis one which greatly facilitates the pouring operations, since the sliding forms This method of supporting the for purposes of illustration, and that thesame principles may be applied to the concrete pouring of 'structuresof other configuration.

Although the invention has been described with particularity as to detail, it is not the intention to limit the claims to the structure shown and described, since modifications thereof may be made without departing from the spirit of the invention. I

I claim a 1. In combination with a structure of the class described, having a groove around its inner wall furnishing a ledge within the plane of the wall surface, a bin bottom having its upper margin entered within said groove and supported by the lower face of said groove.

2. In combination with a structure of the class described, having a groove around its inner wall furnishings. ledge within the plane of the wall surface, a metallic facing member secured to the face of said groove, and a bin bottom having its upper margin entered into said groove and supported by the lower face of said groove and resting upon said metallic facing member.

3. In combination with a structure of the class described, having a groove around its inner wall furnishing a ledge within the plane of the wall surface, a ring-shaped metallic ledge member of angle formation having an upper flange in con tact with the upper surface of the groove and a lower flange member in contact with the lower surface of the groove, and a pin bottom having its upper rim entered within said groove and resting upon the low-er flange of the ledge member.

4. In combination with a structure of the class described, having a groove around its inner walkfurnishing a ledge within the plane of the wall surface, a ring-shaped metallic ledge member of angle formation having an upper flange in contact with the upper surface of the groove and a lower flange member in contact with the lowersurface of the groove, anchoring means secured to said ledge member and imbedded within the wall of the structure, and a bin bottom having its upper rim entered within said groove and resting upon the lower flange of the ledge member.

5. In combination with a structure of the class described, having a groove around its inner wall furnishing a ledge within the plane of the wall surface, a ring-shaped metallic'ledge member of tact with the upper surface of the groove and a lower fiangemember in contact with the lower surface of the groove, a bin bottom having its upper rim entered within said groove and resting upon the lower flange of the ledge member, and 5 attaching bolts entered through 'thelower flange of the ledge member and through the margin of the bin bottom. r

6. Incombination with a structure of the class i described, having a groove around its inner wall '70 furnishing aledge within the planeof the wall 7 surface, a ring-shaped metallic ledge member of angle formation having an'upper flange in contact with the upper surface of the groove and a lower flange member in contact with the lowei surface of the groove, anchoring means secured to said ledge member and imbedded within the wall of the structure, a bin bottom having its upper rim resting upon the lower flange of the ledge member, and attaching bolts entered through the lower flange of the ledge member and through the margin of the bin bottom.

7. In combination with a structure of the class described, having a groove around the inner face of its wall and within the plane of the wall surface, a ring-shaped metallic ledge member of angle formation having its flanges extending obliquely and at substantially right angles to one another, its lower flange abutting against the lower face of the groove and its upper face abutting against the upper face of the groove, clips having their inner ends located beneath the lower flange of the ring-shaped ledge member and each having an extension therefrom imbedded within the wall of the structure, and a bin bottom having its upper margin resting upon and sup-ported by the lower flangeof the ledge member.

8. In combination with a structure of the class described, having a groove around the inner face of its wall and within the plane of the wall surface, a ring-shaped metallic ledge member of angle formation having its flanges extending obliquely and at substantially right angles toone another, the lower flange abutting against the lower face of the groove and its upper flange abutting against the upper face of the groove, clips having their inner ends located beneath the lower flange of the ring-shaped ledge member and each having an extension therefrom imbedded within the wall of the structure, dowel bars entered through said extensions and imbedded within the wall structure for anchoring the clips, and a bin bottom having its upper margin resting upon and supported by the lower flange of the ledge member.

9. In combination with a structure of the class described, having a groove around the inner face of its wall and within the plane of the wall surface, a ring-shaped metallic ledge member of angle formation having its flanges extending obliquely and at substantially right angles to one another, the lower flange abutting against the lower face of the groove and its upper flange abutting against the upper face of the groove, clips having their inner ends located beneath the lower flange of the ring-shaped ledge member and each having an extension therefrom imbedded within the wall of the structure, a bin bottom having its upper margin resting upon and supported by the lower flange of the ledge member, and attaching means entered through each clip and through the lower flange of the ledge member and through the margin of the bin bottom for securing the bin bottom to the ledge member.

10. In combination with a structure of the class described, having a groove around the inner face of its wall and within the plane of the wall surface, a ring-shaped metallic ledge member of angle formation having its flanges extending obliquely and at substantially right angles to one another, the lower flange abutting against the lower face of the groove and its upper flange abutting against the upper face of the groove, clips having their inner ends located beneath the lower flange of the ring-shaped ledge member and each having an extension therefrom imbedded within the wall of the structure, dowel bars entered through said extensions and imbedded within the wall structure for anchoring the clips, a bin bottom having its upper margin resting upon and supported by the lower flange of the ledge member, and attaching means entered through each clip and through the lower flange of the ledge member and through the mar- ALEXANDER CLEVER. 

